1/* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * SPDX-License-Identifier: LGPL-2.1-or-later
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20/*
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
25 */
26
27#ifndef __G_STRFUNCS_H__
28#define __G_STRFUNCS_H__
29
30#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
31#error "Only <glib.h> can be included directly."
32#endif
33
34#include <stdarg.h>
35#include <string.h>
36
37#include <glib/gmacros.h>
38#include <glib/gtypes.h>
39#include <glib/gerror.h>
40#include <glib/gmem.h>
41
42G_BEGIN_DECLS
43
44/* Functions like the ones in <ctype.h> that are not affected by locale. */
45typedef enum {
46 G_ASCII_ALNUM = 1 << 0,
47 G_ASCII_ALPHA = 1 << 1,
48 G_ASCII_CNTRL = 1 << 2,
49 G_ASCII_DIGIT = 1 << 3,
50 G_ASCII_GRAPH = 1 << 4,
51 G_ASCII_LOWER = 1 << 5,
52 G_ASCII_PRINT = 1 << 6,
53 G_ASCII_PUNCT = 1 << 7,
54 G_ASCII_SPACE = 1 << 8,
55 G_ASCII_UPPER = 1 << 9,
56 G_ASCII_XDIGIT = 1 << 10
57} GAsciiType;
58
59GLIB_VAR const guint16 * const g_ascii_table;
60
61#define g_ascii_isalnum(c) \
62 ((g_ascii_table[(guchar) (c)] & G_ASCII_ALNUM) != 0)
63
64#define g_ascii_isalpha(c) \
65 ((g_ascii_table[(guchar) (c)] & G_ASCII_ALPHA) != 0)
66
67#define g_ascii_iscntrl(c) \
68 ((g_ascii_table[(guchar) (c)] & G_ASCII_CNTRL) != 0)
69
70#define g_ascii_isdigit(c) \
71 ((g_ascii_table[(guchar) (c)] & G_ASCII_DIGIT) != 0)
72
73#define g_ascii_isgraph(c) \
74 ((g_ascii_table[(guchar) (c)] & G_ASCII_GRAPH) != 0)
75
76#define g_ascii_islower(c) \
77 ((g_ascii_table[(guchar) (c)] & G_ASCII_LOWER) != 0)
78
79#define g_ascii_isprint(c) \
80 ((g_ascii_table[(guchar) (c)] & G_ASCII_PRINT) != 0)
81
82#define g_ascii_ispunct(c) \
83 ((g_ascii_table[(guchar) (c)] & G_ASCII_PUNCT) != 0)
84
85#define g_ascii_isspace(c) \
86 ((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)
87
88#define g_ascii_isupper(c) \
89 ((g_ascii_table[(guchar) (c)] & G_ASCII_UPPER) != 0)
90
91#define g_ascii_isxdigit(c) \
92 ((g_ascii_table[(guchar) (c)] & G_ASCII_XDIGIT) != 0)
93
94GLIB_AVAILABLE_IN_ALL
95gchar g_ascii_tolower (gchar c) G_GNUC_CONST;
96GLIB_AVAILABLE_IN_ALL
97gchar g_ascii_toupper (gchar c) G_GNUC_CONST;
98
99GLIB_AVAILABLE_IN_ALL
100gint g_ascii_digit_value (gchar c) G_GNUC_CONST;
101GLIB_AVAILABLE_IN_ALL
102gint g_ascii_xdigit_value (gchar c) G_GNUC_CONST;
103
104/* String utility functions that modify a string argument or
105 * return a constant string that must not be freed.
106 */
107#define G_STR_DELIMITERS "_-|> <."
108GLIB_AVAILABLE_IN_ALL
109gchar* g_strdelimit (gchar *string,
110 const gchar *delimiters,
111 gchar new_delimiter);
112GLIB_AVAILABLE_IN_ALL
113gchar* g_strcanon (gchar *string,
114 const gchar *valid_chars,
115 gchar substitutor);
116GLIB_AVAILABLE_IN_ALL
117const gchar * g_strerror (gint errnum) G_GNUC_CONST;
118GLIB_AVAILABLE_IN_ALL
119const gchar * g_strsignal (gint signum) G_GNUC_CONST;
120GLIB_AVAILABLE_IN_ALL
121gchar * g_strreverse (gchar *string);
122GLIB_AVAILABLE_IN_ALL
123gsize g_strlcpy (gchar *dest,
124 const gchar *src,
125 gsize dest_size);
126GLIB_AVAILABLE_IN_ALL
127gsize g_strlcat (gchar *dest,
128 const gchar *src,
129 gsize dest_size);
130GLIB_AVAILABLE_IN_ALL
131gchar * g_strstr_len (const gchar *haystack,
132 gssize haystack_len,
133 const gchar *needle);
134GLIB_AVAILABLE_IN_ALL
135gchar * g_strrstr (const gchar *haystack,
136 const gchar *needle);
137GLIB_AVAILABLE_IN_ALL
138gchar * g_strrstr_len (const gchar *haystack,
139 gssize haystack_len,
140 const gchar *needle);
141
142GLIB_AVAILABLE_IN_ALL
143gboolean (g_str_has_suffix) (const gchar *str,
144 const gchar *suffix);
145GLIB_AVAILABLE_IN_ALL
146gboolean (g_str_has_prefix) (const gchar *str,
147 const gchar *prefix);
148
149#if G_GNUC_CHECK_VERSION (2, 0)
150#ifndef __GTK_DOC_IGNORE__
151#ifndef __GI_SCANNER__
152
153/* This macro is defeat a false -Wnonnull warning in GCC.
154 * Without it, it thinks strlen and memcmp may be getting passed NULL
155 * despite the explicit check for NULL right above the calls.
156 */
157#define _G_STR_NONNULL(x) ((x) + !(x))
158
159#define g_str_has_prefix(STR, PREFIX) \
160 (__builtin_constant_p (PREFIX)? \
161 G_GNUC_EXTENSION ({ \
162 const char * const __str = (STR); \
163 const char * const __prefix = (PREFIX); \
164 gboolean __result = FALSE; \
165 \
166 if G_UNLIKELY (__str == NULL || __prefix == NULL) \
167 __result = (g_str_has_prefix) (__str, __prefix); \
168 else \
169 { \
170 const size_t __str_len = strlen (_G_STR_NONNULL (__str)); \
171 const size_t __prefix_len = strlen (_G_STR_NONNULL (__prefix)); \
172 if (__str_len >= __prefix_len) \
173 __result = memcmp (_G_STR_NONNULL (__str), \
174 _G_STR_NONNULL (__prefix), \
175 __prefix_len) == 0; \
176 } \
177 __result; \
178 }) \
179 : \
180 (g_str_has_prefix) (STR, PREFIX) \
181 )
182
183#define g_str_has_suffix(STR, SUFFIX) \
184 (__builtin_constant_p (SUFFIX)? \
185 G_GNUC_EXTENSION ({ \
186 const char * const __str = (STR); \
187 const char * const __suffix = (SUFFIX); \
188 gboolean __result = FALSE; \
189 \
190 if G_UNLIKELY (__str == NULL || __suffix == NULL) \
191 __result = (g_str_has_suffix) (__str, __suffix); \
192 else \
193 { \
194 const size_t __str_len = strlen (_G_STR_NONNULL (__str)); \
195 const size_t __suffix_len = strlen (_G_STR_NONNULL (__suffix)); \
196 if (__str_len >= __suffix_len) \
197 __result = memcmp (__str + __str_len - __suffix_len, \
198 _G_STR_NONNULL (__suffix), \
199 __suffix_len) == 0; \
200 } \
201 __result; \
202 }) \
203 : \
204 (g_str_has_suffix) (STR, SUFFIX) \
205 )
206
207#endif /* !defined (__GI_SCANNER__) */
208#endif /* !defined (__GTK_DOC_IGNORE__) */
209#endif /* G_GNUC_CHECK_VERSION (2, 0) */
210
211/* String to/from double conversion functions */
212
213GLIB_AVAILABLE_IN_ALL
214gdouble g_strtod (const gchar *nptr,
215 gchar **endptr);
216GLIB_AVAILABLE_IN_ALL
217gdouble g_ascii_strtod (const gchar *nptr,
218 gchar **endptr);
219GLIB_AVAILABLE_IN_ALL
220guint64 g_ascii_strtoull (const gchar *nptr,
221 gchar **endptr,
222 guint base);
223GLIB_AVAILABLE_IN_ALL
224gint64 g_ascii_strtoll (const gchar *nptr,
225 gchar **endptr,
226 guint base);
227/* 29 bytes should enough for all possible values that
228 * g_ascii_dtostr can produce.
229 * Then add 10 for good measure */
230#define G_ASCII_DTOSTR_BUF_SIZE (29 + 10)
231GLIB_AVAILABLE_IN_ALL
232gchar * g_ascii_dtostr (gchar *buffer,
233 gint buf_len,
234 gdouble d);
235GLIB_AVAILABLE_IN_ALL
236gchar * g_ascii_formatd (gchar *buffer,
237 gint buf_len,
238 const gchar *format,
239 gdouble d);
240
241/* removes leading spaces */
242GLIB_AVAILABLE_IN_ALL
243gchar* g_strchug (gchar *string);
244/* removes trailing spaces */
245GLIB_AVAILABLE_IN_ALL
246gchar* g_strchomp (gchar *string);
247/* removes leading & trailing spaces */
248#define g_strstrip( string ) g_strchomp (g_strchug (string))
249
250GLIB_AVAILABLE_IN_ALL
251gint g_ascii_strcasecmp (const gchar *s1,
252 const gchar *s2);
253GLIB_AVAILABLE_IN_ALL
254gint g_ascii_strncasecmp (const gchar *s1,
255 const gchar *s2,
256 gsize n);
257GLIB_AVAILABLE_IN_ALL
258gchar* g_ascii_strdown (const gchar *str,
259 gssize len) G_GNUC_MALLOC;
260GLIB_AVAILABLE_IN_ALL
261gchar* g_ascii_strup (const gchar *str,
262 gssize len) G_GNUC_MALLOC;
263
264GLIB_AVAILABLE_IN_2_40
265gboolean g_str_is_ascii (const gchar *str);
266
267GLIB_DEPRECATED
268gint g_strcasecmp (const gchar *s1,
269 const gchar *s2);
270GLIB_DEPRECATED
271gint g_strncasecmp (const gchar *s1,
272 const gchar *s2,
273 guint n);
274GLIB_DEPRECATED
275gchar* g_strdown (gchar *string);
276GLIB_DEPRECATED
277gchar* g_strup (gchar *string);
278
279
280/* String utility functions that return a newly allocated string which
281 * ought to be freed with g_free from the caller at some point.
282 */
283GLIB_AVAILABLE_IN_ALL
284gchar* (g_strdup) (const gchar *str) G_GNUC_MALLOC;
285GLIB_AVAILABLE_IN_ALL
286gchar* g_strdup_printf (const gchar *format,
287 ...) G_GNUC_PRINTF (1, 2) G_GNUC_MALLOC;
288GLIB_AVAILABLE_IN_ALL
289gchar* g_strdup_vprintf (const gchar *format,
290 va_list args) G_GNUC_PRINTF(1, 0) G_GNUC_MALLOC;
291GLIB_AVAILABLE_IN_ALL
292gchar* g_strndup (const gchar *str,
293 gsize n) G_GNUC_MALLOC;
294GLIB_AVAILABLE_IN_ALL
295gchar* g_strnfill (gsize length,
296 gchar fill_char) G_GNUC_MALLOC;
297GLIB_AVAILABLE_IN_ALL
298gchar* g_strconcat (const gchar *string1,
299 ...) G_GNUC_MALLOC G_GNUC_NULL_TERMINATED;
300GLIB_AVAILABLE_IN_ALL
301gchar* g_strjoin (const gchar *separator,
302 ...) G_GNUC_MALLOC G_GNUC_NULL_TERMINATED;
303
304#if G_GNUC_CHECK_VERSION(2, 0)
305#ifndef __GTK_DOC_IGNORE__
306#ifndef __GI_SCANNER__
307
308G_ALWAYS_INLINE static inline char *
309g_strdup_inline (const char *str)
310{
311 if (__builtin_constant_p (!str) && !str)
312 return NULL;
313
314 if (__builtin_constant_p (!!str) && !!str && __builtin_constant_p (strlen (s: str)))
315 {
316 const size_t len = strlen (s: str) + 1;
317 char *dup_str = (char *) g_malloc (n_bytes: len);
318 return (char *) memcpy (dest: dup_str, src: str, n: len);
319 }
320
321 return g_strdup (str);
322}
323
324#define g_strdup(x) g_strdup_inline (x)
325
326#endif /* !defined (__GI_SCANNER__) */
327#endif /* !defined (__GTK_DOC_IGNORE__) */
328#endif /* G_GNUC_CHECK_VERSION (2, 0) */
329
330/* Make a copy of a string interpreting C string -style escape
331 * sequences. Inverse of g_strescape. The recognized sequences are \b
332 * \f \n \r \t \\ \" and the octal format.
333 */
334GLIB_AVAILABLE_IN_ALL
335gchar* g_strcompress (const gchar *source) G_GNUC_MALLOC;
336
337/* Copy a string escaping nonprintable characters like in C strings.
338 * Inverse of g_strcompress. The exceptions parameter, if non-NULL, points
339 * to a string containing characters that are not to be escaped.
340 *
341 * Deprecated API: gchar* g_strescape (const gchar *source);
342 * Luckily this function wasn't used much, using NULL as second parameter
343 * provides mostly identical semantics.
344 */
345GLIB_AVAILABLE_IN_ALL
346gchar* g_strescape (const gchar *source,
347 const gchar *exceptions) G_GNUC_MALLOC;
348
349GLIB_DEPRECATED_IN_2_68_FOR (g_memdup2)
350gpointer g_memdup (gconstpointer mem,
351 guint byte_size) G_GNUC_ALLOC_SIZE(2);
352
353GLIB_AVAILABLE_IN_2_68
354gpointer g_memdup2 (gconstpointer mem,
355 gsize byte_size) G_GNUC_ALLOC_SIZE(2);
356
357/* NULL terminated string arrays.
358 * g_strsplit(), g_strsplit_set() split up string into max_tokens tokens
359 * at delim and return a newly allocated string array.
360 * g_strjoinv() concatenates all of str_array's strings, sliding in an
361 * optional separator, the returned string is newly allocated.
362 * g_strfreev() frees the array itself and all of its strings.
363 * g_strdupv() copies a NULL-terminated array of strings
364 * g_strv_length() returns the length of a NULL-terminated array of strings
365 */
366typedef gchar** GStrv;
367GLIB_AVAILABLE_IN_ALL
368gchar** g_strsplit (const gchar *string,
369 const gchar *delimiter,
370 gint max_tokens);
371GLIB_AVAILABLE_IN_ALL
372gchar ** g_strsplit_set (const gchar *string,
373 const gchar *delimiters,
374 gint max_tokens);
375GLIB_AVAILABLE_IN_ALL
376gchar* g_strjoinv (const gchar *separator,
377 gchar **str_array) G_GNUC_MALLOC;
378GLIB_AVAILABLE_IN_ALL
379void g_strfreev (gchar **str_array);
380GLIB_AVAILABLE_IN_ALL
381gchar** g_strdupv (gchar **str_array);
382GLIB_AVAILABLE_IN_ALL
383guint g_strv_length (gchar **str_array);
384
385GLIB_AVAILABLE_IN_ALL
386gchar* g_stpcpy (gchar *dest,
387 const char *src);
388
389GLIB_AVAILABLE_IN_2_40
390gchar * g_str_to_ascii (const gchar *str,
391 const gchar *from_locale);
392
393GLIB_AVAILABLE_IN_2_40
394gchar ** g_str_tokenize_and_fold (const gchar *string,
395 const gchar *translit_locale,
396 gchar ***ascii_alternates);
397
398GLIB_AVAILABLE_IN_2_40
399gboolean g_str_match_string (const gchar *search_term,
400 const gchar *potential_hit,
401 gboolean accept_alternates);
402
403GLIB_AVAILABLE_IN_2_44
404gboolean g_strv_contains (const gchar * const *strv,
405 const gchar *str);
406
407GLIB_AVAILABLE_IN_2_60
408gboolean g_strv_equal (const gchar * const *strv1,
409 const gchar * const *strv2);
410
411/* Convenience ASCII string to number API */
412
413/**
414 * GNumberParserError:
415 * @G_NUMBER_PARSER_ERROR_INVALID: string was not a valid number
416 * @G_NUMBER_PARSER_ERROR_OUT_OF_BOUNDS: string was a number, but out of bounds
417 *
418 * Error codes returned by functions converting a string to a number.
419 *
420 * Since: 2.54
421 */
422typedef enum
423 {
424 G_NUMBER_PARSER_ERROR_INVALID,
425 G_NUMBER_PARSER_ERROR_OUT_OF_BOUNDS,
426 } GNumberParserError;
427
428/**
429 * G_NUMBER_PARSER_ERROR:
430 *
431 * Domain for errors returned by functions converting a string to a
432 * number.
433 *
434 * Since: 2.54
435 */
436#define G_NUMBER_PARSER_ERROR (g_number_parser_error_quark ())
437
438GLIB_AVAILABLE_IN_2_54
439GQuark g_number_parser_error_quark (void);
440
441GLIB_AVAILABLE_IN_2_54
442gboolean g_ascii_string_to_signed (const gchar *str,
443 guint base,
444 gint64 min,
445 gint64 max,
446 gint64 *out_num,
447 GError **error);
448
449GLIB_AVAILABLE_IN_2_54
450gboolean g_ascii_string_to_unsigned (const gchar *str,
451 guint base,
452 guint64 min,
453 guint64 max,
454 guint64 *out_num,
455 GError **error);
456
457/**
458 * g_set_str: (skip)
459 * @str_pointer: (inout) (not optional) (nullable): a pointer to either
460 * a string or `NULL`
461 * @new_str: (nullable): a string to assign to @str_pointer
462 *
463 * Updates a pointer to a string to a copy of @new_str and returns whether the
464 * string was changed.
465 *
466 * If @new_str matches the previous string, this function is a no-op. If
467 * @new_str is different, a copy of it will be assigned to @str_pointer and
468 * the previous string pointed to by @str_pointer will be freed with
469 * [func@GLib.free].
470 *
471 * @str_pointer must not be `NULL`, but can point to a `NULL` value.
472 *
473 * One convenient usage of this function is in implementing property settings:
474 * ```C
475 * void
476 * foo_set_bar (Foo *foo,
477 * const char *new_bar)
478 * {
479 * g_return_if_fail (IS_FOO (foo));
480 *
481 * if (g_set_str (&foo->bar, new_bar))
482 * g_object_notify (foo, "bar");
483 * }
484 * ```
485 *
486 * Returns: true if the value of @str_pointer changed, false otherwise
487 *
488 * Since: 2.76
489 */
490GLIB_AVAILABLE_STATIC_INLINE_IN_2_76
491static inline gboolean
492g_set_str (char **str_pointer,
493 const char *new_str)
494{
495 char *copy;
496
497 if (*str_pointer == new_str ||
498 (*str_pointer && new_str && strcmp (s1: *str_pointer, s2: new_str) == 0))
499 return FALSE;
500
501 copy = g_strdup (new_str);
502 g_free (mem: *str_pointer);
503 *str_pointer = copy;
504
505 return TRUE;
506}
507
508G_END_DECLS
509
510#endif /* __G_STRFUNCS_H__ */
511

source code of include/glib-2.0/glib/gstrfuncs.h